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Wolverhampton Intellectual Repository and E-Theses > School of Sport, Performing Arts and Leisure > Research Centre for Sport, Exercise and Performance > Exercise and Health > Pre-exercise alkalosis and Acid-base recovery.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2436/30458
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Title: Pre-exercise alkalosis and Acid-base recovery.
Authors: Siegler, J.C.
Keatley, S.
Midgley, A.W.
Nevill, Alan M.
McNaughton, Lars R.
Citation: International Journal of Sports Medicine, 29(7): 545-551
Publisher: Georg Thieme Verlag
Journal: International Journal of Sports Medicine
Issue Date: 2008
URI: http://hdl.handle.net/2436/30458
DOI: 10.1055/s-2007-989261
PubMed ID: 18004683
Additional Links: http://www.thieme-connect.de/DOI/DOI?10.1055/s-2007-989261
Abstract: The aim of this study was to observe the influence of pre-exercise sodium bicarbonate (NaHCO (3)) ingestion and varying recovery modes on acid-base recovery from a single bout of supramaximal exercise. Nine male subjects completed four separate, randomized cycle ergometer exercise trials to volitional fatigue at 120 % maximum power output, under the following conditions: 0.3 g . kg (-1) BW NaHCO (3) ingestion with passive recovery (BICARB P), 0.3 g . kg (-1) BW NaHCO (3) ingestion with active recovery (BICARB A), placebo ingestion with passive recovery (PLAC P) and placebo ingestion with active recovery (PLAC A). Capillary blood samples were obtained every minute for 15 min during recovery. Significant main effects for pH were observed for time (F = 42.1, p < 0.001), intervention (BICARB and PLAC) (F = 1117.3, p < 0.001) and recovery condition (F = 150.0, p < 0.001), as the BICARB condition reduced acid-base perturbation. Significant interaction effects were observed between conditions (BICARB and PLAC) for active and passive recovery modes (F = 29.1, p < 0.001) as the active recovery facilitated H+ removal better than the passive condition. Pre-exercise alkalosis attenuates blood acid-base perturbations from supramaximal exercise to exhaustion, regardless of whether the recovery mode is active or passive. These findings suggest that individuals may benefit from introducing a pre-exercise alkalotic condition while including passive recovery during high-intensity training protocols.
Type: Article
Language: en
Keywords: Sodium bicarbonate
Active recovery
pH recovery
Supramaximal exercise
Male athletes
Sports Medicine
ISSN: 0172-4622
Appears in Collections: Exercise and Health
Sport, Exercise and Health Research Group
Learning and Teaching in Sport, Exercise and Performance

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